CN218463460U - Electric drive device and vehicle - Google Patents

Abstract

The utility model discloses an electricity drive device and vehicle. The electric drive device includes a housing assembly and a shaft assembly. The shell assembly comprises a first supporting wall, a second supporting wall and a third supporting wall which are sequentially arranged at intervals, and the second supporting wall is provided with an installation through hole. The rotating shaft assembly comprises a motor shaft and a speed reducer input shaft. One end of the motor shaft is rotatably arranged on the first supporting wall, and one end of the input shaft of the speed reducer is rotatably arranged on the third supporting wall. One between the other end of reduction gear input shaft and the other end of motor shaft and installation through-hole normal running fit to be equipped with the transmission hole of being connected with another transmission, another inserts in the transmission hole, and another is equipped with first lubricating oil duct, first lubricating oil duct and transmission hole intercommunication. The electric driving device is compact in structure and good in lubricating effect, the service life of the electric driving device is prolonged, and the reliability of a vehicle is improved.

Description

Electric drive device and vehicle

Technical Field

The present application relates to the field of vehicle technology, and more particularly to an electric drive device and a vehicle.

Background

At present, vehicles such as cars, sport Utility Vehicles (SUVs), utility vehicles, off-road vehicles, buses, motor homes and the like bring a great deal of convenience for life, work, study and the like of people, and occupy an important position in the travel life of people. In order to improve the cruising ability of a vehicle, the development of light weight of the vehicle is more and more emphasized.

In the related art, in order to accommodate the development of light weight, an electric drive device for a vehicle integrates an electric motor and a speed reducer together to reduce the volume. However, the lubrication effect of the electric drive device is not good, which is not beneficial to prolonging the service life of the electric drive device.

SUMMERY OF THE UTILITY MODEL

The application provides an electric drive device and a vehicle. The electric driving device is compact in structure and good in lubricating effect, and is beneficial to prolonging the service life of the electric driving device and improving the electric driving reliability of a vehicle.

The technical scheme is as follows:

according to a first aspect of embodiments of the present application, there is also provided an electric drive device including a housing assembly and a spindle assembly. The shell assembly comprises a first supporting wall, a second supporting wall and a third supporting wall which are sequentially arranged at intervals, and the second supporting wall is provided with an installation through hole. The rotating shaft assembly comprises a motor shaft and a speed reducer input shaft. One end of the motor shaft is rotatably arranged on the first supporting wall, and one end of the input shaft of the speed reducer is rotatably arranged on the third supporting wall. At least one of the other end of the input shaft of the speed reducer and the other end of the motor shaft is in running fit with the mounting through hole. One is equipped with the transmission hole between the other end of reduction gear input shaft and the other end of motor shaft, and another inserts in the transmission hole to be equipped with first lubricant duct, first lubricant duct and transmission hole intercommunication.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the motor shaft of the electric driving device is in transmission connection with the input shaft of the speed reducer, and can rotate relative to the shell assembly by utilizing the first supporting wall, the second supporting wall and the third supporting wall for supporting, so that the transmission structure of the electric driving device is more compact. Simultaneously, through first lubricating oil duct and transmission hole intercommunication, be convenient for carry lubricating oil to between the other end of reduction gear input shaft and the other end of motor shaft for the junction of motor shaft and reduction gear input shaft is lubricated abundant, can reduce wear, and then is favorable to improving the life of electrically driving the device.

The technical solution is further explained below:

in one embodiment, the transmission hole is a spline hole, the other transmission hole is provided with a spline in transmission fit with the spline hole, and the first lubricating oil gallery is arranged on the spline.

In one embodiment, a lubricating gap is formed between the spline and the inner wall of the spline hole, the length direction of the lubricating gap is arranged along the axial direction of the spline, and the first lubricating oil channel is communicated with the lubricating gap.

In one embodiment, the first lubricant oil passage includes a first passage provided in the axial direction of the other and a second passage provided in the radial direction of the other, the second passage being provided on the spline and communicating with the first passage and the spline hole, respectively.

In one embodiment, the first lubricating oil channel is arranged in the motor shaft, and the second lubricating oil channel communicated with the first channel is arranged in the speed reducer input shaft.

Or the first lubricating oil duct is arranged in the input shaft of the speed reducer, and a third lubricating oil duct communicated with the first channel is arranged in the motor shaft.

In one embodiment, the housing assembly is provided with a motor cavity and a speed reduction cavity, the motor cavity is arranged between the first supporting wall and the second supporting wall, and the speed reduction cavity is arranged between the second supporting wall and the third supporting wall. The inner wall of the motor cavity is fixedly provided with a stator, the motor shaft is fixedly provided with a rotor matched with the stator, and the stator is constructed to drive the rotor to rotate.

In one embodiment, the electric drive device further comprises a first bearing, a second bearing and a third bearing, one end of the motor shaft is rotatably arranged on the first supporting wall through the first bearing, one end of the input shaft of the speed reducer is rotatably arranged on the third supporting wall through the third bearing, and one of the other end of the input shaft of the speed reducer and the other end of the motor shaft is rotatably matched with the mounting through hole through the second bearing.

In one embodiment, the first lube oil gallery is configured to deliver lube oil between the other end of the reducer input shaft and the other end of the motor shaft, and the first lube oil gallery is further configured to deliver lube oil to the second bearing.

And/or, the electric drive further includes at least one washer, the housing assembly including a bearing bore configured to mount the third bearing, the at least one washer disposed between the third bearing and a bottom of the bearing bore. The motor shaft is provided with a first limiting part which is in axial limiting fit with the first bearing, one of the space between the other end of the input shaft of the speed reducer and the other end of the motor shaft is provided with a second limiting part which is in limiting fit with the second bearing, the other one of the space is also provided with a third limiting part, and the third limiting part is in axial limiting fit with the transmission hole.

In one embodiment, the motor shaft comprises a first shaft fixedly connected with the inner ring of the first bearing and a second shaft in transmission connection with the first shaft, and the second shaft is in transmission connection with the input shaft of the speed reducer.

According to a second aspect of the embodiments of the present application, there is also provided a vehicle, including a vehicle body device and the electric drive device in any of the above embodiments, wherein the electric drive device is disposed on the vehicle body device.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the vehicle is provided with the electric driving device of any one of the embodiments, and the electric driving device is long in service life, not prone to damage and further beneficial to improving the electric driving reliability of the vehicle.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Brief description of the drawingsthe accompanying drawings, which form a part hereof, are provided to provide a further understanding of the present application, and are included to explain an illustrative embodiment of the present application and a description thereof and are not to be construed as limiting the present application.

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a vehicle shown in an embodiment.

Fig. 2 is a schematic view of the electric drive shown in fig. 1.

Fig. 3 isbase:Sub>A partial cross-sectional view of the electric drive of fig. 2 taken along sectionbase:Sub>A-base:Sub>A.

Fig. 4 is an enlarged schematic view of the region a shown in fig. 3.

FIG. 5 is a partial cross-sectional view of an electric drive device in accordance with an embodiment.

Description of reference numerals:

10. a vehicle; 11. a vehicle body device; 11a, a vehicle body; 11b, a wheel; 12. an electric drive device; 100. a housing assembly; 101. A motor housing; 102. a reducer housing; 110. a first support wall; 120. a second support wall; 121. mounting a through hole; 122. A first side wall; 123. a second side wall; 130. a third support wall; 140. a motor cavity; 150. a deceleration chamber; 160. a stator; 200. a rotating shaft assembly; 200a, a first lube oil gallery; 201. a first channel; 202. a second channel; 200b, a transmission hole; 200c, lubrication gap; 210. a motor shaft; 211. a first limiting part; 212. a first shaft; 213. a second shaft; 214. a third lubricant gallery; 220. a reducer input shaft; 221. a second lube oil gallery; 222. a second limiting part; 223. a third limiting part; 300. a first bearing; 400. a second bearing; 500. a third bearing; 600. a gasket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the disclosure, are intended for purposes of illustration only and are not intended to limit the scope of the disclosure.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Vehicles such as cars, sport Utility Vehicles (SUVs), utility vehicles, off-road vehicles, buses, motor homes and the like bring great convenience to life, work, study and the like of people, and occupy an important position in the travel life of people. And the kind of vehicle is various, and the brand is various for can supply people to select the vehicle many, how to obtain people's favor, promote product competitiveness, become the problem that the vehicle producer more and more paid attention to.

At present, with the improvement of living standard of people, the requirements of people on the cruising ability and the reliability of vehicles are higher and higher. In order to improve the cruising ability of a vehicle, the development of light weight of the vehicle is more and more emphasized.

In the related art, in order to accommodate the development of light weight, an electric drive device for a vehicle integrates an electric motor and a speed reducer together to reduce the volume. However, the lubrication effect of the electric drive device is not good, which is not beneficial to prolonging the service life of the electric drive device.

Based on this, this application provides one kind and drives the device, and this drives the compact structure of device and lubricated effectual electrically, is favorable to improving the life who drives the device electrically, improves the electrically reliability that drives of vehicle.

For a better understanding of the electric drive of the present application, reference is made to a vehicle to which the electric drive is applied.

As shown in fig. 1, in some embodiments, a vehicle 10 is provided that includes a vehicle body assembly 11 and an electric drive assembly 12 of any of the above embodiments. The electric drive device 12 is disposed on the vehicle body device 11.

As shown in fig. 2 and 3, the electric drive device 12 includes a housing assembly 100 and a spindle assembly 200. The housing assembly 100 includes a first support wall 110, a second support wall 120 and a third support wall 130 which are sequentially spaced apart, and the second support wall 120 is provided with a mounting through-hole 121. The rotating shaft assembly 200 includes a motor shaft 210 and a reducer input shaft 220. One end of the motor shaft 210 is rotatably provided to the first support wall 110, and one end of the reducer input shaft 220 is rotatably provided to the third support wall 130. At least one of the other end of the reducer input shaft 220 and the other end of the motor shaft 210 is rotatably fitted to the mounting through-hole 121. One of the two ends of the speed reducer input shaft 220 and the motor shaft 210 is provided with a transmission hole 200b, and the other end is inserted into the transmission hole 200b and provided with a first lubricant oil gallery 200a, and the first lubricant oil gallery 200a is communicated with the transmission hole 200 b.

In this way, the motor shaft 210 of the electric drive unit 12 is drivingly connected to the reducer input shaft 220 and supported by the first support wall 110, the second support wall 120, and the third support wall 130 to be rotatable relative to the housing assembly 100, so that the transmission structure of the electric drive unit 12 is more compact. Meanwhile, the first lubricating oil gallery 200a is communicated with the transmission hole 200b, so that lubricating oil can be conveniently conveyed between the other end of the input shaft 220 of the speed reducer and the other end of the motor shaft 210, the joint of the motor shaft 210 and the input shaft 220 of the speed reducer is sufficiently lubricated, abrasion can be reduced, and the service life of the electric driving device 12 can be prolonged. The electric driving device 12 is not easily damaged due to its long service life, which is favorable for improving the electric driving reliability of the vehicle 10.

As shown in fig. 1, in some embodiments, the vehicle body device 11 includes a vehicle body 11a and wheels 11b rotatably disposed on the vehicle body 11 a. The electric driving device 12 can output power to drive the wheels 11b to rotate, so as to drive the vehicle body device 11 to move forward, backward, turn left or turn right.

It should be noted that the specific implementation of the housing assembly 100 can be various, including but not limited to, one or more housings + one or more end caps.

As shown in fig. 2, in the embodiment, the housing assembly 100 includes a motor casing 101 and a reducer housing 102 fixedly connected to the motor casing 101.

As shown in fig. 3 and 4, the motor and the reducer may alternatively share one supporting wall to form the second supporting wall 120, i.e. both are integrally manufactured, which is beneficial to lightweight design. The motor and the decelerator may also be respectively provided with a support wall, and the second support wall 120 is formed by the fixed connection between the support walls, so that the assembly is convenient.

As shown in fig. 3 and 4, in some embodiments, the first supporting wall 110 includes a first sidewall 122 disposed opposite to the first supporting wall 110 and a second sidewall 123 disposed opposite to the third supporting wall 130, and the first sidewall 122 is fixedly connected to the second sidewall 123. In this way, the motor shaft 210 can be mounted on the first supporting wall 110 and the first side wall 122, the input shaft 220 of the speed reducer can be mounted on the second side wall 123 through the third supporting wall 130, and then the first side wall 122 and the second side wall 123 are fixedly connected, so that the motor shaft 210 is in transmission connection with the input shaft 220 of the speed reducer, the assembly is easy, and the assembly efficiency of the electric driving device 12 is improved.

It should be noted that, there are various ways for implementing the transmission matching between the motor shaft 210 and the input shaft 220 of the speed reducer through the transmission hole 200b, including but not limited to the transmission matching between the non-circular hole and the non-cylindrical body, or implementing the transmission connection between the two ways such as bonding, screwing, clamping, etc.

Further, the non-circular hole includes a partial circular hole, a polygonal hole, a special-shaped hole, and the like.

In addition to any of the above embodiments, in some embodiments, the transmission hole 200b is a spline hole, another transmission hole is provided with a spline in transmission fit with the spline hole, and the first lubricant oil gallery 200a is provided in the spline. Therefore, the spline connection structure is utilized to realize the transmission connection between the other end of the input shaft 220 of the speed reducer and the other end of the motor shaft 210, so that the transmission connection between the two is reliable and the lubrication is convenient.

On the basis of the above embodiments, as shown in fig. 4, in some embodiments, a lubrication gap 200c is provided between the spline and the inner wall of the spline hole, the length direction of the lubrication gap 200c is arranged along the axial direction of the spline, and the first lubricant oil gallery 200a communicates with the lubrication gap 200 c. Thus, the first lubricant oil passage 200a is communicated with the lubrication gap 200c, so that the lubricant oil can be conveniently conveyed between the other end of the reducer input shaft 220 and the other end of the motor shaft 210, and the joint of the motor shaft 210 and the reducer input shaft 220 is sufficiently lubricated.

Further, as shown in fig. 3 and 4, the first lube oil passage 200a in some embodiments includes a first passage 201 provided in the axial direction of the other and a second passage 202 provided in the radial direction of the other, the second passage 202 being provided on the spline and communicating with the first passage 201 and the spline hole, respectively. In this way, the first through hole is used to accommodate the lubricating oil, and the internal space of the motor shaft 210 or the reducer input shaft 220 can be fully utilized, which is advantageous for the weight reduction of the electric drive device 12. Meanwhile, lubricating oil is conveniently added, and the lubricating oil is conveyed to a fit clearance between the motor shaft 210 and the input shaft 220 of the speed reducer through the fit of the first channel 201 and the second channel 202.

Alternatively, as shown in fig. 3 and 4, in some embodiments, the first lubricant oil passage 200a is provided in the motor shaft 210, and the second lubricant oil passage 221 communicating with the first passage 201 is provided in the reducer input shaft 220. In this way, the first lubricant oil channel 200a can be disposed in the motor shaft 210 and communicate with the second lubricant oil channel 221, and the lubricant oil can be further delivered between the reducer input shaft 220 and the third support wall 130, so that the joint between the reducer input shaft 220 and the housing assembly 100 is sufficiently lubricated and is subjected to wear reduction.

Alternatively, as shown in fig. 5, the first lube oil passage 200a is provided in the reducer input shaft 220 in some embodiments, and the third lube oil passage 214 communicating with the first passage 201 is provided in the motor shaft 210. In this way, the first lubricant oil channel 200a can be disposed in the reducer input shaft 220 and communicate with the third lubricant oil channel 214, and the lubricant oil can be delivered between the motor shaft 210 and the third supporting wall 130, so that the joint between the motor shaft 210 and the housing assembly 100 is sufficiently lubricated and is worn at a reduced speed. And also facilitates the injection of lubrication oil from the housing assembly 100.

The specific material of the lubricating oil may be various, and is not limited to this.

In addition to any of the above embodiments, as shown in fig. 3 and 4, in some embodiments, the housing assembly 100 is provided with a motor cavity 140 and a deceleration cavity 150, the motor cavity 140 is disposed between the first supporting wall 110 and the second supporting wall 120, and the deceleration cavity 150 is disposed between the second supporting wall 120 and the third supporting wall 130. The inner wall of the motor cavity 140 is fixedly provided with a stator 160, the motor shaft 210 is fixedly provided with a rotor matched with the stator 160, and the stator 160 is constructed to drive the rotor to rotate. Therefore, the stator 160 and the mover are magnetically excited to cooperate to drive the rotor to rotate in the motor cavity 140, so as to drive the motor shaft 210 to rotate, and the other end of the motor shaft 210 is rotatably connected to the other end of the input shaft 220 of the speed reducer, so that the motor shaft 210 also drives the input shaft of the speed reducer to rotate.

It should be noted that the specific implementation manner of the reduction cavity 150, the reducer input shaft 220 and other reduction gears cooperating to form the reducer can be various, and is not limited herein. The output rotating speed and the torque of the motor input shaft can be adjusted.

In addition to any of the above embodiments, as shown in fig. 3, in some embodiments, the electric drive device 12 further includes a first bearing 300, a second bearing 400 and a third bearing 500, one end of the motor shaft 210 is rotatably disposed on the first support wall 110 through the first bearing 300, one end of the reducer input shaft 220 is rotatably disposed on the third support wall 130 through the third bearing 500, and one of the other end of the reducer input shaft 220 and the other end of the motor shaft 210 is rotatably engaged with the mounting through hole 121 through the second bearing 400. In this manner, the reducer input shaft 220 is rotatably mounted to the housing assembly 100 by the second bearing 400 and the third bearing 500, and the motor shaft 210 is supported by the first bearing 300 and the reducer input shaft 220 and the second bearing 400, so that the motor shaft 210 is rotatably mounted to the housing assembly 100. Compared with the conventional electric drive 12, the bearing can be saved, which is beneficial to reducing the material cost of the electric drive 12.

On the basis of any of the embodiments of the second bearing 400 described above, as shown in fig. 3, in some embodiments, the first lube oil gallery 200a is configured to deliver lube oil between the other end of the reduction gear input shaft 220 and the other end of the motor shaft 210, and the first lube oil gallery 200a is also configured to deliver lube oil to the second bearing 400. In this way, the first lubricant oil gallery 200a can deliver lubricant oil to the space between the other end of the reducer input shaft 220 and the other end of the motor shaft 210 and the second bearing 400, so that the joint between the motor shaft 210 and the reducer input shaft 220 and the second bearing 400 are sufficiently lubricated, and wear can be reduced.

In addition to any of the embodiments of the third bearing 500 described above, as shown in fig. 3, in some embodiments, the electric drive 12 further includes at least one washer 600, the housing assembly 100 includes a bearing bore configured to receive the third bearing 500, and the at least one washer 600 is disposed between the third bearing 500 and a bottom of the bearing bore. The motor shaft 210 is provided with a first limit part 211 axially limited and matched with the first bearing 300, one of the other end of the reducer input shaft 220 and the other end of the motor shaft 210 is provided with a second limit part 222 limited and matched with the second bearing 400, the other is also provided with a third limit part 223, and the third limit part 223 is axially limited and matched with the transmission hole 200 b. Thus, the first and third limiting portions 211 and 223 can prevent the axial movement of the motor shaft 210 from being too large, thereby improving the smoothness of the vehicle 10. In addition, the second limiting portion 222 and the at least one washer 600 can prevent the reducer input shaft 220 from shifting too much in the axial direction, and improve the smoothness of the vehicle 10.

It should be noted that the "first limiting portion 211" may be a "part of the motor shaft 210", that is, the "first limiting portion 211" and "the other part of the motor shaft 210" are integrally formed; or a separate member that is separable from the "other part of the motor shaft 210", that is, the "first stopper portion 211" may be manufactured separately and then combined with the "other part of the motor shaft 210" into a single body.

Equivalently, the "body" and the "certain part" can be parts of the corresponding "component", i.e., the "body" and the "certain part" are integrally manufactured with other parts of the "component"; or an independent component which can be separated from other parts of the component, namely a certain body and a certain part can be manufactured independently and combined with other parts of the component into a whole. The expressions "a certain body" and "a certain part" in the present application are only one example, and are not intended to limit the scope of the present application for reading convenience, and the technical solutions equivalent to the present application should be understood as being included in the above features and having the same functions.

It should be noted that the "washer 600" may be one of the parts of the module "electric drive 12", i.e., assembled with the other components of the module "electric drive 12" into a module, and then assembled modularly; or may be separate from the other components of the electric drive 12, i.e., may be integral with the other components of the electric drive 12.

Equivalently, the components included in the device and the equipment can be flexibly combined, namely, the device and the equipment can be produced in a modularized mode according to the actual situation and can be assembled in a modularized mode as an independent module; the components may be assembled separately, and a single module may be constructed in the present apparatus. The division of the above components in the present application is only one of the embodiments, which is convenient for reading and does not limit the scope of protection of the present application, and as long as the above components are included and the functions are the same, it should be understood that the present application is an equivalent technical solution.

On the basis of any of the above embodiments, as shown in fig. 3, in some embodiments, the motor shaft 210 includes a first shaft 212 fixedly connected with the inner ring of the first bearing 300 and a second shaft 213 in transmission connection with the first shaft 212, and the second shaft 213 is in transmission connection with the reducer input shaft. Thus, the first shaft 212 and the second shaft 213 are matched to reduce the manufacturing difficulty of the motor shaft 210 and the manufacturing cost.

Alternatively, in some embodiments, the reducer input shaft includes a third shaft (not shown) fixedly connected to the inner race of the third bearing and a fourth shaft (not shown) drivingly connected to the third shaft, the fourth shaft being drivingly connected to the motor shaft. Therefore, the manufacturing difficulty of the input shaft of the speed reducer can be reduced and the manufacturing cost is reduced by utilizing the matching of the third shaft and the fourth shaft.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one component is considered to be "fixedly connected" to another component, the two components may be fixed by way of detachable connection, or may be fixed by way of non-detachable connection, such as socket connection, clamping connection, integrally formed fixing, welding, etc., which can be realized in the conventional technology, and is not cumbersome.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. An electric drive device, comprising:

the shell assembly (100) comprises a first supporting wall (110), a second supporting wall (120) and a third supporting wall (130) which are sequentially arranged at intervals, wherein the second supporting wall (120) is provided with a mounting through hole (121); and

the rotating shaft assembly (200) comprises a motor shaft (210) and a speed reducer input shaft (220), one end of the motor shaft (210) can be rotatably arranged on the first supporting wall (110), one end of the speed reducer input shaft (220) can be rotatably arranged on the third supporting wall (130), at least one of the other end of the speed reducer input shaft (220) and the other end of the motor shaft (210) is in rotating fit with the installation through hole (121), one of the other end of the speed reducer input shaft (220) and the other end of the motor shaft (210) is provided with a transmission hole (200 b), the other one of the other end of the speed reducer input shaft is inserted into the transmission hole (200 b), and is provided with a first lubricating oil duct (200 a), and the first lubricating oil duct (200 a) is communicated with the transmission hole (200 b).

2. The electric drive according to claim 1, characterized in that the drive bore (200 b) is a splined bore, the other being provided with splines in driving engagement with the splined bore.

3. The electric drive device according to claim 2, wherein a lubrication gap (200 c) is provided between the spline and the inner wall of the spline hole, a length direction of the lubrication gap (200 c) is arranged in an axial direction of the spline, and the first oil gallery (200 a) communicates with the lubrication gap (200 c).

4. An electric drive device according to claim 2, characterized in that the first oil gallery (200 a) includes a first passage (201) provided in the axial direction of the other and a second passage (202) provided in the radial direction of the other, and the second passage (202) is provided on the spline and communicates with the first passage (201) and the spline hole, respectively.

5. Electric drive device according to claim 4, characterized in that the first oil gallery (200 a) is provided in the motor shaft (210), and in that a second oil gallery (221) is provided in the reducer input shaft (220) in communication with the first passage (201);

or, the first lubricating oil gallery (200 a) is arranged in the speed reducer input shaft (220), and a third lubricating oil gallery (214) communicated with the first channel (201) is arranged in the motor shaft (210).

6. An electric drive according to claim 1, characterized in that the housing assembly (100) is provided with a motor cavity (140) and a speed reduction cavity (150), the motor cavity (140) being arranged between the first support wall (110) and the second support wall (120), the speed reduction cavity (150) being arranged between the second support wall (120) and the third support wall (130); the inner wall of the motor cavity (140) is fixedly provided with a stator (160), the motor shaft (210) is fixedly provided with a rotor matched with the stator (160), and the stator (160) is constructed to drive the rotor to rotate.

7. The electric drive device according to any one of claims 1 to 6, characterized in that the electric drive device (12) further comprises a first bearing (300), a second bearing (400) and a third bearing (500), one end of the motor shaft (210) being rotatably disposed on the first support wall (110) via the first bearing (300), one end of the reducer input shaft (220) being rotatably disposed on the third support wall (130) via the third bearing (500), one of the other end of the reducer input shaft (220) and the other end of the motor shaft (210) being rotatably engaged with the mounting through-hole (121) via the second bearing (400).

8. The electric drive device according to claim 7, characterized in that the first lube oil gallery (200 a) is configured to deliver lube oil to between the other end of the reducer input shaft (220) and the other end of the motor shaft (210), the first lube oil gallery (200 a) being further configured to deliver lube oil to the second bearing (400);

and/or, the electric drive (12) further comprises at least one washer (600), the housing assembly (100) comprises a bearing bore configured to mount the third bearing (500), the at least one washer (600) is disposed between the third bearing (500) and a bottom of the bearing bore;

the motor shaft (210) is provided with a first limiting part (211) which is axially limited and matched with the first bearing (300), one of the other end of the speed reducer input shaft (220) and the other end of the motor shaft (210) is provided with a second limiting part (222) which is limited and matched with the second bearing (400), the other one of the two parts is also provided with a third limiting part (223), and the third limiting part (223) is axially limited and matched with the transmission hole (200 b).

9. Electric drive according to claim 7, characterized in that the motor shaft (210) comprises a first shaft (212) fixedly connected with the inner ring of the first bearing (300) and a second shaft (213) in driving connection with the first shaft (212), the second shaft (213) being in driving connection with the reducer input shaft.

10. A vehicle, characterized in that it comprises a body arrangement (11) and an electric drive arrangement (12) according to any one of claims 1 to 9, said electric drive arrangement (12) being provided on said body arrangement (11).

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